/Engine/Plugins/Experimental/GeometryScripting/Source/GeometryScriptingCore/Public/GeometryScript/ListUtilityFunctions.h
Updates the value associated withIndexin theIndexList. If theIndexis invalid, the operation will fail and in this case bValidIndex will be set to false on return.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="GeometryScript|ListUtils", Meta=(ScriptMethod)) static void SetIndexListItem ( [FGeometryScriptIndexList](API\Plugins\GeometryScriptingCore\GeometryScript\FGeometryScriptIndexList) & IndexList, int Index, int NewValue, bool & bIsValidIndex )